In situ genotypic populations exhibit many of the same characteristics as soft bodies in physics. They can be deformed by both internal pressures (stress) and external pressures (strain.) Constrained genetic elasticity is the physical manifestation of Dembski’s “constrained optimization” argument. The genotypes (and phenotypes) of biological organisms can gravitate toward extreme physical display characteristics (as with bright coloration, horns, feathers, etc) as the result of population stress caused by preferential selection for secondary sexual characteristics (as with the Bird of Paradise.) External pressures, such as food shortages, provide external strain and can result in transient deformations such as the island effect (as with Mammuthus exilis.) Notably, cave fish and cichlid populations demonstrate elasticity as well as regression toward archetypal forms when stress and strain are attenuated. We see here a clear example of syntecture; an intelligent designer’s use of parallel design elements in physics and genetics.